are you sure you are specifying directory paths the way shown in code? double backward slash is required.
fd.uploadFile(
"C:\\temp\\guest\\steveproxy.jar"
,
"c:\\temp\\steveproxy.jar"
);
fd.uploadFile(
"C:\\temp1\\guest\\"
,
"c:\\temp\\"
);
Also please check what is the uploadFile() method signature i.e. What is source path & what is destination path.
If you resolve above 2 stuffs, code should go through.